WO1996004702A3 - Laser stabilization and tuning with wedged etalon - Google Patents

Laser stabilization and tuning with wedged etalon Download PDF

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Publication number
WO1996004702A3
WO1996004702A3 PCT/US1995/009258 US9509258W WO9604702A3 WO 1996004702 A3 WO1996004702 A3 WO 1996004702A3 US 9509258 W US9509258 W US 9509258W WO 9604702 A3 WO9604702 A3 WO 9604702A3
Authority
WO
WIPO (PCT)
Prior art keywords
etalon
wavelength
photodetectors
light source
wedged
Prior art date
Application number
PCT/US1995/009258
Other languages
French (fr)
Other versions
WO1996004702A2 (en
Inventor
David B Hall
Original Assignee
Litton Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Litton Systems Inc filed Critical Litton Systems Inc
Priority to AU31412/95A priority Critical patent/AU3141295A/en
Publication of WO1996004702A2 publication Critical patent/WO1996004702A2/en
Publication of WO1996004702A3 publication Critical patent/WO1996004702A3/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/136—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity
    • H01S3/137—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity for stabilising of frequency
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/139—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
    • H01S3/1392—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length by using a passive reference, e.g. absorption cell

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
  • Spectrometry And Color Measurement (AREA)

Abstract

The wavelength of a light source (e.g., laser) is stabilized by introducing a collimated beam from the source into a 'wedged' etalon, i.e., an etalon having a Fabry-Perot cavity that continuously decreases in width along at least one axis that is normal to the axis of beam propagation. A pair of photodetectors at the output side of the etalon detect respective portions of the beam traversing different cavity widths. The respective output signals of the photodetectors are employed in a feedback loop, whereby the wavelength of the light source is controlled so as to minimize the amplitude difference between the two photodetector signals. The wavelength of the light source can be tuned by varying the ratio of the amplitudes of the photodetector output signals. The wedged etalon can also be used as a multi-channel optical receiver, wherein a multi-wavelength collimated incident beam is introduced into the etalon. An array of photodetectors is disposed at the output side of the etalon, each located at a position corresponding to a different cavity width, so that each photodetector receives one of the component wavelengths of the incident beam.
PCT/US1995/009258 1994-07-29 1995-07-24 Laser stabilization and tuning with wedged etalon WO1996004702A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU31412/95A AU3141295A (en) 1994-07-29 1995-07-24 Laser stabilization and tuning with wedged etalon

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/285,031 US5428700A (en) 1994-07-29 1994-07-29 Laser stabilization
US08/285,031 1994-07-29

Publications (2)

Publication Number Publication Date
WO1996004702A2 WO1996004702A2 (en) 1996-02-15
WO1996004702A3 true WO1996004702A3 (en) 1996-04-04

Family

ID=23092445

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/009258 WO1996004702A2 (en) 1994-07-29 1995-07-24 Laser stabilization and tuning with wedged etalon

Country Status (3)

Country Link
US (1) US5428700A (en)
AU (1) AU3141295A (en)
WO (1) WO1996004702A2 (en)

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Also Published As

Publication number Publication date
US5428700A (en) 1995-06-27
WO1996004702A2 (en) 1996-02-15
AU3141295A (en) 1996-03-04

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